CVE-2020-6463: Use After Free

Published Apr 21, 2020
·
Updated

Crafted media files could lead to a race in texture caches, resulting in a use-after-free, memory corruption, and a potentially exploitable crash.

Other sources

Use after free in ANGLE in Google Chrome prior to 81.0.4044.122 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.

— Launchpad

Affected Software

21 affected componentsFixes available
Mozilla Thunderbird<68.11
68.11
Mozilla Thunderbird<78.1
78.1
Mozilla Firefox<79
79
Mozilla Firefox ESR<68.11
68.11
Mozilla Firefox ESR<78.1
78.1
Google Chrome<81.0.4044.122
81.0.4044.122
Google Chrome<81.0.4044.122
Fedoraproject Fedora=31
Fedoraproject Fedora=32
Canonical Ubuntu Linux=16.04
Canonical Ubuntu Linux=18.04
Canonical Ubuntu Linux=20.04
Debian Debian Linux=9.0
Debian Debian Linux=10.0
openSUSE Backports SLE=15.0-sp1
openSUSE Leap=15.1
openSUSE Leap=15.2
debian/chromium
120.0.6099.224-1~deb11u1143.0.7499.169-1~deb12u1146.0.7680.71-1~deb12u1143.0.7499.169-1~deb13u1146.0.7680.71-1~deb13u1145.0.7632.159-1146.0.7680.71-1
debian/firefox
148.0.2-1
debian/firefox-esr
115.14.0esr-1~deb11u1140.8.0esr-1~deb11u1128.14.0esr-1~deb12u1140.8.0esr-1~deb12u1140.4.0esr-1~deb13u1140.8.0esr-1~deb13u1140.8.0esr-1
debian/thunderbird
1:115.12.0-1~deb11u11:140.8.0esr-1~deb11u11:140.6.0esr-1~deb12u11:140.8.0esr-1~deb12u11:140.6.0esr-1~deb13u11:140.8.0esr-1~deb13u11:140.8.0esr-1

Event History

Apr 21, 2020
CVE Published
12:00 AM
May 21, 2020
CVE Published
via MITRE·03:46 AM
Data Sourced
via MITRE·03:46 AM
DescriptionWeakness
Data Sourced
via NVD·04:15 AM
DescriptionSeverityWeaknessAffected Software
Feb 23, 2026
Data Sourced
via Ubuntu·07:56 PM
RemedyDescriptionSeverityAffected Software
Data Sourced
via Launchpad·07:56 PM
Description
Mar 13, 2026
Data Sourced
via Debian·08:11 PM
DescriptionAffected Software

Parent advisories

This vulnerability appears in the following advisories.

Peer vulnerabilities

Found alongside the following vulnerabilities.

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Frequently Asked Questions

1

What is CVE-2020-6463?

CVE-2020-6463 is a vulnerability in Mozilla Firefox and Thunderbird that could lead to a use-after-free memory corruption and a potentially exploitable crash.

2

How severe is CVE-2020-6463?

CVE-2020-6463 has a medium severity rating.

3

Which software is affected by CVE-2020-6463?

Mozilla Firefox ESR versions up to 68.11, Thunderbird versions up to 68.11, Firefox versions up to 79, Firefox ESR versions up to 78.1, and Thunderbird versions up to 78.1 are affected.

4

How can CVE-2020-6463 be exploited?

CVE-2020-6463 can be exploited using crafted media files that lead to a race in texture caches.

5

How can I fix CVE-2020-6463?

To fix CVE-2020-6463, users should update Mozilla Firefox and Thunderbird to the recommended versions.

Company

Resources

Contact

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CVE-2020-6463 - Use After Free - SecAlerts